Finding the Fourth Proportional to 1,900.05, 2,848.33 and 666.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,900.05 : 2,848.33 = 666.78 : x
2. Step 2: Convert to fraction form
   1,900.05/2,848.33 = 666.78/x
3. Step 3: Cross multiply
   1,900.05x = 2,848.33 × 666.78
4. Step 4: Simplify right side
   1,900.05x = 1,899,209.48
5. Step 5: Solve for x
   x = 1,899,209.48/1,900.05
6. Step 6: Final answer
   x = 999.56